Automatic stopping mechanism for doubling



(No Model.) 2 Sheets-Sheet 1.

J. BOYD. AUTOMATIC STOPPING MECHANISM FOR DOUBLING, TWISTING, AND

WINDING MACHINES.

m Patented Apr. 28, 1891.

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(No Model.)

. 2 Sheets-Sheet 2. J. BOYD. AUTOMATIC STOPPING MECHANISM FOR DOUBLING, TWISTING, AND

WINDING MACHINES.

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JOHN BOYD, OF GLASGOlV, SCOTLAND.

AUTOMATIC STOPPING MECHANISM FOR DOUBLING, TWISTING, AND WINDING MACHINES.

I SPECIFICATION formingpart of Letters Patent No. 451,194, dated April 28, 1891. Application filed December 8, 1886- Serial No. 221,041. (No model.) I Patented in England November 13, 1877, No. 4,241.

To all whom, it may concern.-

Be it known that I, JOHN BOYD, a resident of Glasgow, in the county of Lanark, Scotland,- and a subject of the Queen of Great Britain, have invented an Improvement in Automatic Stopping Mechanisms for Doubling, Twisting, and WVinding Machines, (for which I have obtained British Letters Patent dated November 13, 187 7, No. 4,241,) of which the following is a specification.

My present invention relates to automatic stopping mechanism of thekind having hanging wire detectors carried by a pendulous plate, arranged so that when an end of yarn or thread breaks or fails the detector, which was held up by that end, drops and its lower end gets into the way of a rotating or reciprocating cam or wiper, which, by acting on the dropped detector, moves the pendulous plate and thereby releases a catch and brings about the stoppage of the winding action. By my invention the mechanism is improved and simplified, an important feature of my improved arrangement being the moving or keeping of the pcndulous plate so as to hold the wire detectors out of reach of the rotating or reciprocating cam or wiper immediately on the catch hereinbefore referred to being released.

On Sheet 1 of the accompanying drawings my improved detector mechanism is shown as applied in a machine for doubling and winding, Figure 1 being a transverse vertical section of a part of the machine; Fig. 2, a plan of the main lever of the detector mechanism; and Figs. 3, 4, and 5, a plan and front and side elevations of the pendulous plate with the wire detectors.

On Sheet 2 my improved detector mechanism is shown as applied in a machine for doubling, twisting, and winding, Fig. 6 being a transverse vertical section of a part of the machine, and Fig. 7 a plan of the main lever of the detector mechanism. The parts of the detector mechanism which I now claim and desire to secure by Letters Patent of the United States are practically the samein the applications shown on the two accompanying sheets of drawings, and throughout these drawings the same reference-numerals are culiarly-dotted lines are drawn off bobbins or cops, which are not shown, and pass upward over frictional surfaces on rails S and over adjustable wire-guides 9 to the wire detectors 10, thence up to and over pulleys 11, carried by arms 12, fixed to a longitudinal traversebar 13, and finally descend from the pulleys 11 to the bobbins 14, upon which they are wound. Each bobbin let is held between the cheeks or side plates of a holder 15, which is centered on a pin or spindle 16, and while the winding proceeds each bobbin rests on a rotating pulley 17, which drives it by frictional contact with the barrel of the bobbin or with the yarn already wound thereon. A handlever 18 is provided in connection with each bobbin-holder l5 and by means of a pin projecting from it and acting on the under edge of one side of the holder. Such edge, being peculiarly shaped for the purpose, serves for raising and holding up the holder and for lowering it when required.

\Vhen an end breaks or fails, the winding action is stopped by the bobbin ll being lifted up off the driving-pulley 17. This is efiected by a slip or plate 19, which is fixed to the main lever 20 of the detector mechanism, this lever20 being centered on a rail 21 under and near the bottom of, the drivingpulley 17. On the left hand sides of Figs. 1 and 6 thelever 20 and other parts are shown in the positions in which they are when the winding or twisting and Winding action is proceeding, while on the right-hand side of the same figures the lever and other parts are shown in the positions assumed when a stoppage takes place. page takes place, the front edge of the slip or plate 19, which was previously near the line of contact between the driving-pulley 17 and the bobbin 14, enters between those parts and lifts the bobbin up. The slip or plate 19 is rigid and rigidly fixed to and may be formed in the same piece with the lever 20, and in consequence of this, and of the center of the lever being suitably placed, it lifts the bobbin WVhen a stopwithout frictional contact with the surface of the driving-pulley. The lever 20 is so weighted as when free to itself lift the bobbin 14, as hereinbefore described, a part of the weight being applied in the form of a handle 22, which projects forward conveniently for adj usting the lever when about to recommence winding.

The detector mechanism for each bobbin 14 comprises a pendulous plate 23,jointed to a small bracket 24, fixed to the under side of a longitudinal frame-rail 25. The pendulous plate 23 carries the detector-wires 10, which are formed with curls at their upper ends for the yarns or threads, and which have their lower ends guided in holes in a rib formed along the bottom of the front of the plate 23,

'while their upper parts are guided in grooves in an upper rib, in which grooves they are retained by a pin 26 passed through holes in the rib in front of them. The detector-wires 10 are kept from turning and in their proper positions by small plates 27 fixed on them, so as to be almost or quite in contact with the flat surface and so as to limit the extent of their up and down movements between the ribs on the pendulous plate 23. On the back or inner side of the pendulous plate 23 there is a catching-edge 28 formed on the pendulous plate itself or on asmall plate fixed thereto, the surface below the catching-edge being vertical or nearly so when the parts are in position for winding, as shown at the left-hand sides of Figs. 1 and 6. The level-2O is provided with a catching-edge 29 to engage with the catching-edge 28 of the pendulous plate, such catching-edge 29 being formed on the lever itself or on a small plate fixed thereto; and when the lever 20 is raised by means of its handle 22, the pendulous plate 23 swings by its own weight so as to bring its catch or catching-edge 28 under the catch or catchingedge 29 of the lever 20. Then when the handie 22 is let go the lever 20 will be supported by the pendulous plate 23, as shown at the left-hand sides of Figs. 1 and 6. Directly below the pendulous plate 23 there is a continuously rotating wiper or cam-shaft 30, the projecting parts of which rotate just clear of the lower ends of the detector-Wires 10, as long as all these wires are held up by the strains of the yarns or threads passing through their curls; but on any one of the set of yarns or threads breaking or failing the corresponding detector-wire 10 drops and the cam-shaft 3O acts on it and through it moves the pendulous plate 23, so as to take its catch 28 from under the catch 29 of the lever 20. The action is instantaneous and the forward part of the lever 20 at once descends by its weight and its back end 19 lifts up the bobbin, as hereinbefore described.

In detector mechanism in which a continuously rotating or reciprocating cam or wiper is used to act on detectors when getting within its range through losing the support of the yarns or threads it is of great practical importance to avoid continuance of the action of the cam or wiper on the detectors and the wear and injury that would be caused by such continuance, and it is a distinguishing feature of my invention that the desired result is obtained in a very simple, direct, quick, and effectual manner. The catch or catchingedge 29 of the lever 20, when resting on the catch 28 of the pendulous plate 23, is at a certain short distance above the plane of the fulcrum of the lever 20, and as the surface extending down from the catching-edge 28 of the pendulous plate 23 is then vertical it follows that on the pendulous plate moving sufficiently to let the lever 20 drop the catchingedge 29 of that lever must move the pendulous plate 23 outward, or must at least keep it turned a certain distance outward, when made to swing outward by the action of the wiper or cam-shaft 30. The parts are pro portioned and placed relatively to each other, so that when the pendulous plate 23 is thus moved or kept in the turned-out position the bottoms of the detector-wires 10, even in their lowest positions will be clear or out of the range of the projections of the wiper or camshaft 30. The extent of the drop or descent of the forward part of the lever 20 is limited in any convenient way, as, for example, by the part of the lever near the centercoming to rest on the sole of the piece on which the lever is centered. The lever 20 has thus two functions. On being released it moves by its weight, so as to lift the bobbin 14 off the drivingpulley 17, thereby stopping the winding action, and it at the same time acts on the pendulous plate 23, so as to keep the wire detectors 10 out of reach of the cam or wiper 30.

In the application shown on Sheet 2 of the drawings, the following details remain the same as in the application shown on Sheet 1- namely, the pendulous plate 23 with its detector-wires 10 and catch 28, the part of the main detector-lever 20 with its catch 29 acting in connection with the pendulous plate,

and the rotating wi'per or cam-shaft 30. \Vhen the lever 20 becomes released from the catch 28 of the pendulous plate 23 on a yarn or thread breaking or failing it brings about the stoppage of the doubling, twisting, and winding action. For this purpose the lever 20 is connected by a rod 31 to a weighted lever32, which acts on a spring-clutch 33, by means of which the spindle 34 is driven, and when the lever 20 is let go by the detector mechanism the weighted lever 32 moves the clutch 33 out of driving contact with the pulley 35 on the spindle 34. At the same time the inner end of the lever 20 pushes upward a rod 36, attached to a lever 37, carrying the lower feed-roller 38, and makes the lever 37 lower the roller 38 out of contact with the upper driven feed-roller 39-, thereby stopping the feeding action.

I hereby disclaim the constructions illusstopping devices and having a catch to engage with the catch on the pendulous plate and when released to hold the pendulous plate with its wire detectors clear of the wiper or cam, all substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses,

' JOHN BOYD.

' Witnesses:

EDMUND HUNT, R0131. KINNIBURGH. 

